;;;
;;; Translational Kinematics
;;;

(defproblem kt1a
    :statement (
        "The SR-71 strategic reconnaissance aircraft, the Blackbird,"
        "set a world speed record by flying from London to Los "
        "Angeles (8,790 km) in 3 hr 47 min 36 s."
        " "
        "Compute the average speed in meters per second (m/s).  "
        (answer)
    )
    :graphic "kt1a.gif"
    :features (kinematics dynamics working Andes2)
    :choices (
            (bodies (aircraft Earth ))
    )
    :times ( (1 "aircraft takes off") (2 "aircraft lands") (during 1 2) )
    :givens (
	(object aircraft)
	(time (during 1 2))
	(given (duration (during 1 2)) (dnum 13656 |s|))
	(given (distance aircraft :time (during 1 2)) (dnum 8790000 |m|))
   ) 
   :soughts ( (answer (speed aircraft :time (during 1 2))) )
)

